webpack.common.js

const path = require("path");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
  entry: {
    app: "./client/src/index.js"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-react"],
            plugins: [
              ["@babel/plugin-proposal-decorators", { legacy: true }],
              "@babel/plugin-syntax-dynamic-import"
            ]
          }
        }
      },
      {
        test: /\.css$/,
        use: ["style-loader", "css-loader"]
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf)$/,
        loader: "file-loader"
      }
    ]
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      template: "./client/src/public/index.html"
    })
  ],
  devServer: {
    historyApiFallback: true
  },
  output: {
    filename: "[name].bundle.js",
    chunkFilename: "[name].chunk.js",
    path: path.resolve("./dist"),
    publicPath: "/"
  }
};